Questions tagged [motor]

An electrical actuator that converts electrical energy into rotational motion or sustained linear motion (linear motor). There are many types of electric motors. If the specific type of motor is known, it is helpful to use or add a more specific tag, such as dc-motor, brushless-dc motor or induction-motor.

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2answers
33 views

L293D and PWM speed control [Solved]

I'm using L293D to control a motor. The motor input pin of L293D is controlled by output pins of HT12D IC. To control the speed of the motor I have a PWM signal from Arduino, but to which pin of L293D ...
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Control two DC brushed motors with two wires in common

I'm working on a retrofitting project. I need to control 3 DC brushed motors with full H-bridge drivers. In most scenarios the 3 motors have independent connections: simulate this circuit – ...
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63 views

Using supercapacitors on DC-DC converter output for high in-rush current

I have a motor that draws a max continuous current of 60A, but has a peak in-rush draw over 120A for a few milliseconds. I want to power the motor using a DC-DC converter. I purchased a converter that ...
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102 views

Rectified 230VAC to 24VDC

I am building a simple motor control application, driving a series wound motor that runs on rectified 230VAC. Originally, it was controlled by a pendant switch connected to a 7 pin connector. The idea ...
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1answer
47 views

Lens Aperture Motor - wiring

I'm trying to use an industrial camera lens that has two internal motors. One is for zoom, with DC voltage, reversible for direction. The other motor is for the shutter. It is presumably a stepper. ...
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1answer
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Is this a capacitive start motor and can i start it with this capacitor

I salvaged an old motor out of a air conditioner and I want to know if it's a capacitor start motor if I can start it with the capacitor I have and how to start it. I included pictures of the motor ...
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**BLDC MOTOR transient conditions ** [closed]

**when the speed of motor reversed suddenly what happen to the Voltage, and current parameters of that motor can any explain in brief **
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2answers
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FOC Iq peak current overshoot

I have a FOC controller for a servo motor, where the Iq current can overshoot the maximum allowed Iq current (That is the reference value limit for Iq) by around 80-100% under heavy dynamic load. When ...
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Why is saturation required for a self-excited generator? [closed]

Please somebody give me the answer. I have tried to look up, but didn't got any answers. Please help
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1answer
34 views

Motor Control - Max Id and Iq values

When talking about closed-loop motor control, people usually refer to a rotational frame in DQ terms. In motor specifications(see image below) the value of current is more likely to be specified in ...
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1answer
66 views

Is this a capacitor start motor and can I start it with a microwave capacitor [closed]

I salvaged an old motor out of a air conditioner and I want to know if it's a capacitor start motor if I can start it with the capacitor I have and how to start it. I included pictures of the motor ...
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1answer
35 views

Multiplexing L298N motor drivers

I'm working on a project where I need to drive 20 motors with no speed control just running the motors. But I don't have 20 available pins to connect to all the drivers directly. Is it okay to ...
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How much suspended weight and how far down would it need to be lowered in order to generate 100 kWh?

I am working on a 100 kWh capacity gravity battery bank. How much suspended weight and how far down would it need to be lowered in order to generate 100 kWh? How many kWh would it take to lift the ...
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What causes a brushless motor to heat up?

I have an RC airplane and I installed a motor on it. I want to guard against the motor burning up, and I have a few questions: What causes waste heat in the motor? Is it purely proportional to the ...
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1answer
55 views

How do i control a 6 V supply output based on a 5 V input?

I have a signal from a microcontroller that varies from 0 V to 5 V. I also have a separate 6 V supply to power a motor. I'm trying to design a circuit that allows the microcontroller signal to ...
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1answer
25 views

EV controller output signals

I am designing an electric vehicle controller for a university project. The motor driver varies the speed according to an analog voltage (0V-12V). My queston is, should I use a digital potentiometer ...
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1answer
36 views

Waveforms of BLDC motor

I am using L6235 to drive a BLDC motor with hall sensors, but I am not sure about the motor's wire connection. Can you tell which connection is correct by looking at the waveforms? datasheet of L6235: ...
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1answer
60 views

Encoder PPR Required Resolution

This question leads on from a question I asked last night, so some people will know it. I am using an FPGA with a 1000 ppr rotary quadrature encoder counting 4x (counting all edges is 4000ppr) and had ...
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1answer
50 views

Motor impedance too high at 20kHz

I have an H-bridge I am driving with an Arduino Mega. The motors I am driving are fairly large, steady state 48 watts, maximum 300 watts. I am driving them at 16 volts and a switching frequency to ...
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2answers
81 views

Arduino spuriously resets with power draw

I have a simple circuit, pictured below, that uses an Arduino to control two large bidirectional motors via 12V relays. Normally this works a treat, but sometimes the Arduino ends up resetting itself. ...
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Connect motor in 220 VAC single phase (Line - Neutral) or in 110VAC two phases (110VAC - 110VAC “180 degree out of phase”)?

I need to connect A motor of 220VAC to single phase connection :Line - Neutral(220VAC - Neutral). In my country that doesn't exist so in my country we have this : L1-L2-neutral (110VAC - 110VAC "...
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22 views

How to calculate motor specs for vending machine

I'm trying to make a vending machine and I need motor to deliver the products. How can I calculate specs such as torque, rpm, power etc? Maximum weight would be 10 soda cans. Let's say each weigh 0....
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Why the speed and current will decrease when I change the connection delta to star on ac motor?but reduce motor voltage will have opposite result?

On the 3phase motor, The motor has been accelerated to a stable operating speed, then I reduce the line voltage -> speed decrease -> slip increase -> current increase -> the power will ...
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41 views

How can i make the pulse at V2 shift by 180 degrees in order to make it a negative 7.2 symbol for H bridge motor

This is the circuit I built in Lt spice. The NMOSFETS I downloaded online have 1,2,3 automatically i cant change the label. 1= drain, 2 = gate, 3= source. This is the result i get However i need to ...
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2answers
148 views

Anything wrong with connecting L298Ns in parallel?

Although L298Ns are very inefficient, they're very cheap. I have two motors that require 4A+ current at load combined. Can I connect multiple L298Ns in parallel in this way to increase the overall ...
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1answer
75 views

Why do European motorized appliances draw less inrush current than their American counterparts?

I have been trying to tease apart the history and evolution of arc fault circuit interrupter requirements, and in the process, came across a curious historical sidenote early in its genesis, namely ...
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1answer
52 views

FOC performance direction dependent

I'm struggling with a FOC setup, which turns the motor better in one direction than the other and I really don't know, what I could do, to solve this problem, since nothing seems to change it. You ...
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1answer
34 views

How to calculate duty cycle of a servo motor?

I have this servo motor and in its specifications only speed and torque is given: ...
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1answer
28 views

Motor Driver Deadtime, on-switching-time and off-switching-time

I have the following motor driver (DRV8320): https://www.ti.com/lit/ds/symlink/drv8320.pdf?ts=1616576087660&ref_url=https%253A%252F%252Fwww.ti.com%252Fproduct%252FDRV8320 Since I want to implement ...
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33 views

How do I control the speed of a universal AC motor and measure the voltage and current flowing through it?

It is desired to be able to control the speed of my rotary drill as well as measure the average torque (or is RMS torque a thing?) of the universal AC motor. I am using this torque equation: τ = (I * ...
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31 views

Finding Stator Current of an induction motor [closed]

I really don't know where to start to answer these questions. The question begins with heating a battub of .18m^3 of water and the heating element is a 1.5 ohms per phase. The heat is trasnfered with ...
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1answer
43 views

How to wire up a PSC motor from a air conditioning unit?

[ I hope someone can help with this. I have a LG air conditioning compressor motor. (PSC type motor). It has three terminals not labelled. Its new but came without a wiring diagram. I've searched the ...
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2answers
115 views

How to stop ESP32 resetting when motor starts?

This is my first post here and I'm new to electronics. I am trying to control a motor using an ESP32 Cam. See attached image for a rather crude schematic. The power supply is rated for 2.4A. I am ...
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1answer
101 views

Why won't my capacitors work?

I am completely new to electrical engineering. For a school project I am making a crank-electricity generator. My idea was to attach a crank to a stepper motor and when I crank the shaft, use the ...
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1answer
42 views

BLDC Coil Sizing / Moment of Inertia

I am currently building a bldc motor and am trying to gauge the amount of force the coils in my motor would need to generate. In order to move a desired load - to a particular speed. Without taking ...
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1answer
96 views

Why do some motors have both 50Hz and 60Hz on their nameplate, and some do not?

I have seen some induction motors have information on their nameplate listed for 50hz and 60hz. While I've read a requirement that the Voltage/Frequency ratio be consistent, using these nameplate ...
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1answer
30 views

I have a five 12 V DC motors and I want to use an SMPS instead of lithium battery

I have five 12 V, 3 A DC motors and a lithium battery pack, 12 V, 30 Ah and an SMPS, 12 V 30 A. Can I use the SMPS as the motor power supply instead of batteries?
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What happens when the motor torque is constant and the load torque suddenly decreases?

It is a situation where the load torque (Ta) suddenly decreases while rotating the shaft with a motor(PMSM) at a constant motor torque (Tm). In my opinion, the rotational speed of the shaft (I-moment ...
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Why does BLDC shaft magnetic field collapse when commutation occurs

I'm watching this video to try to understand motor control, https://youtu.be/WYJWdMV3YMs?t=420 Here the video says that one of three phases would "collapse" in its field strength when ...
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2answers
60 views

Are BLDC motors permanent magnet motors also?

I have to buy a BLDC motor and I was expecting it to be a permanent magnet motor and also when I read on internet link Where it was mentioned that BLDC motor are permanent magnet motor. But when I ...
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Question on H bridge motor circuit

I just finished task 1 on my project but my teacher has not provided any good guidelines so I was just hoping if you guys could check my work before I move on to step 2 and let me know if I'm correct ...
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2answers
59 views

Number of windings keeping constant the poles

What happens if I increase the number of windings around the poles keeping constant the number of poles in a motor? for sure the rotational speed should be the same, I think that we will obtain a more ...
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1answer
58 views

h bridge motor circuit on LT specie

I've been working on a project where i'm building a h bridge motor circuit i have easily spent 15 hours on it and have made extremely slow progress on it in the last 3 days. The project sheet is seen ...
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31 views

visual studio gui to control stepper motor

I am using visual studio 2019 and wants to build gui to give commands like speed to control stepper motor through arduino. I am new to visual studio. can someone share code or can explain? Thanks
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36 views

instantaneous overcurrent relays for motor protection

Can someone please clarify something about below statement. "For motors that are prone to locked rotor, instantaneous overcurrent relays, adjusted to pickup at 200 to 300% of rated motor current, ...
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1answer
82 views

Is the current in the correct direction in this image describing a one phase generator?

The dot on the left is current going towards us according to the image. But if the magnet is rotating counter clockwise while the conductor is stationary (which is same as magnet being stationary ...
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1answer
93 views

What is the name of this book?

I recently got a 2 page pdf document on double revolving field theory but I cant find the name of the book. Can anyone identify this book?
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1answer
62 views

Isn't the voltage reading in this image wrong?

The conductor is moved from top to bottom through the B-field. Shouldn't the reading be negative on the volt-meter? Right-hand-rule gives that the positive charges experience a force towards us. Then ...
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2answers
32 views

Control 12v DC motor with arduino and two relays in both directions

I am using an Arduino and two relays to control 12V DC motor in both directions. For the first trials it worked fine. Finally, my Arduino was fried on another direction swtich. I think there is ...
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1answer
78 views

Meaning of “Supply Voltage: 3~132V” on an electric drive system plate? [closed]

I have an electric drive system for a garage door that has the supply voltage mentioned above. What does the 3~132V mean?. The output torque is 190 NM and the output speed is 85 rpm. The input current ...

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